.todoapp {
    margin: 0 auto;
    width: 400px;
}

.header {
    text-align: center;
    position: relative;
}

.header h1 {
    font-size: 50px;
}

.header .new-todo {
    display: inline-block;
    height: 40px;
    width: 100%;
    border: 1px solid #ccc;
    border-bottom: none;
    padding-left: 30px;
}

.header input[type=checkbox] {
    display: inline-block;
    width: 16px;
    height: 16px;
    border-radius: 50% !important;
    position: absolute;
    left: 10px;
    top: 80px;
}

.selected {
    color: #fff;
    background-color: #000;
}